feature: skip publication?

[daniel-mohr]

For testing and setting up a workflow in an own project it would help a lot to have a flag in the configuration to skip the publication.

(I tried to use a zenodo token deosit: write. This token should not be able to do the publishing. But at least on sandbox.zenodo.org it seems to allow publishing.)

[led02]

We at least added a "publish to file" plugin which will output the CodeMeta data. This might be useful for temporary use. However, configuration of single (sub-)steps is certainly on our agenda - also to improve the testability of the tool and finally provide more automated tests!